Since there are already plenty of lists out there that features some of the most essential add-ons, I'm left with sharing to you all this collection of fun Firefox add-ons. So what exactly is a fun add-on? --It is an add-on that's simply made for entertainment purposes.

Now, if you are ready, here's my list of '10 Fun Firefox Add-ons':

1. Halloween ThemeSince it's almost Halloween, why not decorate your Firefox with this dark-looking theme adorned with customized icons of witches flying across the full moon, Jack-o-lantern, flying bats, haunted house, and a black cat.

2. PacmanA Pacman-clone for Firefox. You can start playing the game by pressing the up arrow or the down arrow key. Features include:* stunning retro graphics* authentic sound effects* back-in-the-80s feeling* highscore list

3. Add-ArtIf you hate seeing adds on websites, then you must try this. Add-Art replaces advertising images on web pages with contemporary art from a curated database. It is bundled with the AdBlockPlus extension. Add-Art provides the millions of AdBlockPlus users with an alternative to blank space. Art shows are hand selected by curators of contemporary artists to bring the museum onto your screen and into your everyday activities.

6. Perapera-kun: Japanese Popup TranslatorLearning Japanese can be both fun and useful. Why not try this Japanese Popup Translator that allows you to see the pronunciation and English meaning of Japanese words when you place your mouse over them.

7. Tom Green Live!If you can't get enough of Tom Green, you can track the status of www.tomgreen.com, whether Tom Green is broadcasting live or not with this neat toolbar icon. It has a Drag 'n dropable icon for your toolbar: Color green: Tom is on; Color black: Tom is off.

8. Baseball Theme and ToolbarFor baseball fanatics, this one is for you. This combined theme and toolbar includes a favorite team selector, embedded news as well as an expandable sidebar with the latest baseball videos.

9. Boston Celtics ThemeI love basketball and I love Boston Celtics. The theme celebrates the peerless glory of this great NBA franchise. Its navigation and toolbars are composed of green and white colors with big icons that symbolize the Celtics.

10. HalloFFThis is yet another Halloween inspired theme. Jack Skellington, along with other characters from the Nightmare Before Christmas can bee seen in this theme making it dark, fun, and really cool looking.